Drill-grinding machine.



PATENTED NOV. 3, 1903.

G. RIDDERHOF. DRILL GRINDING MACHINE.

APPLIOATION FILED JAN. 8. 1903.

3 SHEETSSHEET 1 N0 MODEL.

Zitgesses: M

PATENTED NOV. 3, 1903.

C. RIDDERHOF. DRILL GRINDING MACHINE.

APPLICATION FILED JAN. 8, 1903.

3 SHEETS-SHEET 2.

N0 MODEL.

III

3 ,3." I g'llllllllllm I 11 ill-IE.:illllElI-El l i x w E Witgesses:

No. 743,033. PATENTED NOV.-3, 1903. c. RIDDERHOF. DRILL GRINDING MACHINE.-

APPLIOATION FILED JAN. 8. 1903. H0 MODEL. 3 SHEETS-SHEET 3.

El 1 a El l I I L a a i E Qjf W fiil ll lllf Witnesses:

UNITED STATES Patented November 3, 1903.

PATENT OFFICE.

CORNEIL RIDDERHOF, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO THE WILMARTI-I & MORMAN COMPANY, OF GRAND RAPIDS, MICHIGAN.

DRILL-GRINDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 743,033, dated November 3, 1903.

Application filed January 8,1903. Serial No. 138.226. (No model.)

To all whom it may concern,-

Be it known that I, CORNEIL' RIDDERHOF, a citizen of the United States,residing at the city of Grand Rapids, in the county of Kent and State of Michigan, haveinvented certain new and useful Improvements in Drill-Grinding Machines, of which the following is a specification.

This invention relates to improvements in drill-grinding machines. It has to do with the arrangement and manipulation of the 7 ing-wheel in its relation to the drill-point in such manner that the same can be readily ingrinding-wheel rather than with the holder for the drill, the holder adopted being similar to that shown in the patent issued to Henry P. White on February 20, 1900, No. 643,703.

In the style of drill-grinders most commonly on the market at the present time the grinding is accomplished on the radial face of the wheel as distinguished from its periphery, and this necessitates a special construction of wheel which is cupped out at the center and is not so easily obtained as the emerywheels in ordinary use for other purposes, and owing to the special features there is a considerable advance in the price of such grinding-wheels.

It is the object of my invention to provide a means whereby thestandard regular form of emery or other grinding wheels is made available.

Second. In the common form of drill-grinders a comparatively large surface of the drillpoint is exposed to the grinding-wheel, which traverses lengthwise ofthe lip rather than across the same, therebygenerating bythe abrasive action a considerable amount of heat, and as the motion of the surface of the wheel is not directly away from the edge to be ground this heat is liable to soften the cutting edge. It is my purpose to avoid this contingency by the special arrangement of the grinding-Wheel in relation to the holder, as aforesaid, so that the heat will be carried away from the edge and this contingency avoided.

Third. It is also my purpose to overcome the difliculty of grooving or creasing the grinding-wheehwhichis now so likely to occur unless great pains is taken in the adjust ment of the drill-holder, by providing a recipa manner that the whole is freely illuminated, so that the workman can see exactly what is taking place in the grinding operation.

Fifth. It is my object to arrange the grindspected without danger from the flying sparks Further objects relating to details will definitely appear in the detailed description to follow. I accomplish the objects of my invention by the devices and means described in the following specification.

A structure embodying the features of my invention is clearly illustrated in the accompanying drawings, forming a part of this specification, in which t Figure 1 is a side elevation view of a drillgrinding machine embodying the features of my invention. Fig. 2 is a front elevation .view of the same with the drill-holder H de- Itached and removed. Fig. 3 is a'sectional plan View taken on line 3 3 of Fig. 2 ofthe structure as it is illustrated in Fig. 2, the drill-holder being omitted. Fig. 4 is an enlarged vertical detail sectional view taken on a line corresponding to line 4 l of Fig. 2, showing the reciprocating means for reciprocating the grinding-wheel up and down and the method of its adjustment, the drivingpulley, the central standard G, the spindle for the grinding-wheel D, and the stud I being shown in full lines. Fig. 5-is an'enlarged detail sectional view on the irregular line 5 5 of Fig. 2 through the reciprocating gearing and vertical adjusting means for the spindle Y rs a of the lower end of thescrew-adjusting rod for varying the elevation of the grindingwheel. Fig. 7 is a detail cross view of the drill-holder H, showing its V-shaped form.

In the drawings all of the sectional views are taken looking in the direction of the lit-" tle arrows at the ends of the section-lines, and similar letters of reference refer to similar parts throughout the several views.

Referring to the lettered parts of the drawings, the main frame A is provided with a suitable base, which carries bracket-boxings B B for the driving-shaft B of the machine. A tight and loose pulley G is provided for connection to the power. A pulley O is on the shaft B, which drives the spindle D by means of a suitable belt turning at right angles over idlers F and running to pulley E. The pulley E is secured by a suitable setscrew on the sleeve E, and this drives the spindle D by means of a suitable feathere in a suitable featherway, so that the spindle D v while it is rotated may be freely reciprocated cally and the point of the drill is brought into contact with the periphery-0f the same, as clearly appears in Fig. 1. A plunger G is provided in the main frame A, and the grinding-wheel spindle D rests upon it, so that when this plunger is reciprocated up and down the wheel-spindle D moves up and down with it. The plunger G is connected by a pitman G' to the wrist-pin on the gearwheel a. The gear-wheel a is carried on a suitable journal I), securedto an arm J, which arm is secured oris integral with a sleeve J, which embraces the driving-shaft B of the machine. On the end of the driving-shaft B is a small pinion a, meshing with the gearwheel 01,, thereby actuating the same through the pitman G constantly reciprocating the wheel -spindle D by its actuation of the plunger G. The arm J is adjustable up and down and by the screw rod 0, extending through asuitable eye 0, secured to the outer end of the arm J. A hand-Wheel c is on the upper end of the rod c,which extends through a suitable bracket on the main frame A at a point convenient to the hand of the operator. It will thus be seen that we have here an effective drill-grinder in which the periphery of the grinding-wheel is made use of as an abrading-surface,thereby using the grinding wheel in exactly the same manner as it is ordinarily used.

A special means is provided for reciprocating the holder up and down, thereby insuring even wearing of the grinding-wheel, so that the points of all drills presented to the same will be ground smooth and true.

-Owing to the fact that the holder is V- shaped, difierent sized drills when placed within the same will reach to differentheights in relation to the grinding-wheel, and therefore an adjustment is provided for varying the elevation at which the grinding-wheel reciprocates to accommodate this varying elevationof the drill-points. As the grindingwheel in this position turns rapidly away from the drill-point, there is no danger of unduly heating the cutting edge.

I have-shown my improved drill-grinder in the form in which it is preferred by me. I am aware, however, that the details of construction can be greatly varied without departing from the broad features of my invention. There are a great variety of means of making the wheel-spindle adjustable up and down or of reciprocating it up and down in a revolving sleeve or pulley or other rotatable part. I

I have shown means preferably adjusting the grinding-wheel to the proper elevation, though any means that would change the relative position of thedrill-holder and grinding-wheel could be employed in this relation.

Where I have shown gearings, other driving means might be employed, and it is obvious that this drill-grinding machine would be adapted to direct electrical connection, it being unnecessary for me to illustrate the same for the purposes of this patent.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a drill-grinding machine, the combination of the main frame A; a vertical adjustable and reciprocating wheel-spindle D supported therein,with a horizontal grindingwheel D thereon; a V-shaped drill-holder H supported on a suitable stud I in position to present the point of the drill to the periphery of the grinding-wheel; a suitable drivingshaft B with belt connections to a pulley and sleeve embracing the wheel-spindle D, and feathered thereon, whereby the same can be reciprocated up and down; a plunger G beneath the wheel-spindle D for reciprocating the same up and down; a pitman G connected to the lower end of the plunger G; a gearwheel a, to the wrist-pin of which the lower end of the pitman G is connected; a pinion a on the end of the drivingeshaft for actuating the gear-wheel a; a sleeve J embracing the driving-shaft, with a lateral arm J carrying a suitable journal 1) on which the gear a revolves; a screw-rod 0 connected to a pivoted eye 0 on the arm J with a hand-wheel c for adjusting the same, all coacting together substantially as described and for the purpose specified.

2. In a drill-grinding machine, the combination of the main frame A; a vertical adjustable and reciprocating wheel-spindle D supported therein, with a horizontal grind- ICO ing-wheel D thereon; a V-shaped drill-holder H supported in position to present the point of the drill to the periphery of the grinding- Wheel; a suitable driving-shaft B with belt connections to a pulley and sleeve embracing the wheel-spindle D, and feathered thereon, whereby the same can be reciprocated up and down; a plunger G beneath the wheel-spindleD for reciprocating the same up and down; a pitman G connected to the lower end of the plunger G; a gearwvheel a to the wrist-pin of which the lower end of the pitman G is connected; apinion a on the end of the driving-shaft for actuating the gear-wheel a; a sleeve J embracing the driving'shaft, with a lateral arm J carrying a suitable journal b on which the gear a revolves; means for adjusting the same, substantially as described.

3. In a drill-grinding machine, the combination of the main frame A; a vertical adjustable and reciprocating wheel-spindle D supported therein, with a horizontal grinding-wheel D thereon; a V-shaped drill-holder H supported on a suitable stud I in position to present the point of the drill to the periphery of the grinding-wheel; a suitable drivingshaft B with belt connections to a pulley and sleeve embracing the wheel-spindle D and to a pivoted eye 0 on the arm J with a handwheel 0, substantially as described.

4. In a drill'grinding machine, the combination of the main frame A; a vertical reciprocating wheel-spindle D supported therein, with a horizontal grinding-Wheel D thereon; a drill-holder H supported on a suitable stud I in position to present the point of the drill to the periphery of the grinding-wheel; asuitable driving-shaft B with belt connections to a pulley and sleeve embracing the wheel-spindle D, and feathered thereon, whereby the same can be reciprocated up and down; a plunger G beneath the wheel-spindle D for reciprocating the same up and down; a pitman G connected to the lower end of the plunger G; a gear-wheel a to the wrist-pin of which the lower end of the pitman G is connected; means fordriving said gear-wheel a; a screw-rod 0 connected to the pivoted eye 0 on the arm Jwith a hand-wheel a, substantially as described.

5. In a drill-grinding machine, the combi- I nation of the main frame A a vertical reciprocating wheel-spindle D supported therein, with a horizontal grinding-wheel D thereon; a drill-holder H supported on a suitable stud I in position to present the point of the drill to the periphery of the grinding-wheel; a suitable driving-shaft B with belt connections to a pulley and sleeve embracing the wheel -spindle D, and feathered thereon, whereby the same can be reciprocated up and down; a plunger G beneath the wheel-spindle D for reciprocating the same up and down; means of actuating said plunger; a screw-rod 0 connected to a pivoted eye a on the arm J with ahand-wheel c for adjusting the same, substantially as described.

6. In a drill-grinding machine, the combination of the main frameA; avertical reciprocating wheel-spindle'D supported therein with a horizontal grinding-wheel D thereon; a drill-holder H supported on a suitable stud Iin position to present the point of the drill to the periphery of the grinding-wheel; a suitable driving-shaft B with belt connections to a pulley and sleeve embracing the wheel spindle D, and feathered thereon, whereby the same can be reciprocated up and down; a screw-rod a connected to a pivoted eye 0 on the arm J with a hand-wheel for adjusting the same, substantially as described.

7. In a drill-grinding machine, the combination of the main frame A; a vertical reciprocating wheel-spindle D supported therein, with a horizontal grinding-wheel D. thereon; a drill-holder I-I supported on a suitable stud I in position to present the point of the drill to the periphery of the grinding-wheel; a screw-rod 0 connected to a pivoted eye 0 on the arm J with a hand-wheel c for adjusting the same, substantially as described,

8. In a drill-grinding machine, the combi-.

nation of a vertical reciprocating wheel-spindle; a grinding-wheel thereon; and a holder arranged to present the point of the drill to the periphery of the said grinding-Wheel, as specified. I

9. In a drill-grinding machine, the combination of a suitable frame; a vertical reciprocating wheel-spindle; a horizontal grindingwheel thereon; a V-shaped drill-holderto present the point of the drill to the grindingwheel, and means of adjusting the elevation at which the grinding-wheel reciprocates, for the purpose specified. 1

In witness whereof I have hereunto set my hand and seal in the presence of two witnesses.

CORNEIL RIDDERI-IOF. [L. s.]

Witnesses:

F. P. MARTIN, JOHN MORAN. 

